Brand Buying Guide · Updated November 1, 2026

OUPES Power Stations: Which OUPES Mega Should You Buy?

For most buyers the best OUPES power station is the Mega 1. It has 1,024 Wh of LiFePO4, 2,000W output and 800W of solar input, and it expands to 5,120 Wh with B2 batteries. For whole-home 240V backup, step up to the Guardian 6000. OUPES's lineup runs from the 1 kWh Mega 1 to the 5 kWh Mega 5 and the transfer-switch-ready Guardian 6000. Its units rate 87–89/100 in our scoring. They are strong on watt-hours per dollar but trail the big brands on weight, warranty clarity and independent review history.

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By Morgan Chen Reviewed & approved by Juhi Sahni | Published: 2026-10-31 | Updated: November 1, 2026 | How we score

Our Verdict: Start With the OUPES Mega 1

The Mega 1 is the OUPES to buy if you want a 1 kWh station for outages, camping or a van. It is also the only OUPES portable that had both a live Amazon price and B2 expansion support when we checked. Its listing and reviews agree on 2,000W continuous output with a 4,500W surge rating and expansion to 5,120 Wh with two B2 batteries (The Solar Lab; Bob Vila; OUPES). Currently $446.49 on Amazon, it scores 89/100 in our scoring. Both reviews flag the trade-off: loud fans.

Check Mega 1 Price on Amazon → Read our OUPES Mega 1 review →

The Full OUPES Power Station Lineup Compared

These are the current OUPES Mega and Guardian models. Every model uses LiFePO4 cells. The Mega 1, Mega 1 Lite and Guardian 6000 figures come from our product database. The Mega 2 Pro, Mega 3 and Mega 5 figures are published specs from OUPES's Amazon listings and The Solar Lab's reviews (sources at the bottom of the page). The Price column shows today's Amazon price where one exists. Otherwise it links to the listing.

Model	Capacity	Output / surge	Solar in	Expansion	Weight	Best for	Price
OUPES Mega 1	1,024 Wh	2,000W / 4,500W	800W	Up to 5,120 Wh (2 × B2)	27.8 lb	Budget 1 kWh backup, camping	$446.49
OUPES Mega 1 Lite	1,024 Wh	2,000W / 4,500W	800W	None listed	26.7 lb	Laptops (2 × 140W USB-C), no expansion needed	$489.00
OUPES Mega 2 Pro	2,048 Wh	2,500W / 3,800W peak	1,000W	Up to 10,240 Wh (4 × B2)	48 lb	RVs (TT-30R), 2 kWh home backup	Check price at Amazon →
OUPES Mega 3 (sold as kits)	3,072 Wh	3,600W / 7,000W	2,100W	Up to 15,360 Wh (6 × B2)	~86 lb	Multi-day outages, big solar arrays	Check price at Amazon →
OUPES Mega 5	5,040 Wh	4,000W (120V only)	2,100W	Not confirmed	Conflicting figures	Large 120V-only backup	Not on Amazon now
OUPES Guardian 6000 V2	4,608 Wh	6,000W, 120/240V	3,600W*	Up to 41 kWh	95 lb	Whole-home backup via transfer switch	$2,199.00

* Guardian figures are for the current V2 model sold under our Amazon link (the V1 is sold out at OUPES): 3,600W solar input and a 9,000W surge, matching the Amazon listing and OUPES. The Mega 3 is sold on Amazon only in kits; the price link goes to the Mega 3 + B2 battery kit. The Solar Lab gives the Mega 3's weight as 86 lb; we found no second source. Published Mega 5 weights conflict (roughly 110 to 131 lb depending on the source), so we leave weight out. We found no live Amazon listing for the Mega 5.

Which OUPES Should I Buy? Pick by What You Need to Run

Start with the most important load and how long it has to run. The smallest OUPES that covers it is your starting point.

Fridge, CPAP and router through a short outage

OUPES Mega 1

1,024 Wh · 2,000W · 27.8 lb · 89/100

The best-value OUPES. If outages get longer, add one or two B2 batteries later.

Price: $446.49

Laptops and a lighter carry

OUPES Mega 1 Lite

1,024 Wh · 2,000W · 26.7 lb · 87/100

Two 140W USB-C ports against the Mega 1's 100W, and about a pound lighter. Its listing mentions no B2 expansion support.

Price: $489.00

Solar in one box

OUPES Mega 1 + 240W panel

1,024 Wh · 2,000W · 240W folding panel included

OUPES's listing says the panel refills the Mega 1 in 5–8 hours of sun. That listing also states a 3-year warranty.

Kit price: $693.49

RV hookups and 2 kWh backup

OUPES Mega 2 Pro

2,048 Wh · 2,500W · TT-30R · 48 lb

The TT-30R outlet plugs straight into a 30A RV inlet. It adds a 1,000W Anderson DC port and expands to 10.24 kWh. It had no live Amazon price when we checked.

Check price at Amazon →

Multi-day outages, big solar array

OUPES Mega 3

3,072 Wh · 3,600W · 2,100W solar

The Solar Lab says each AC outlet supports 20A and calls its 30A plug a “true” one. Its output can't be expanded, but its capacity can (to 15.36 kWh). It is sold on Amazon only in kits.

Check price at Amazon →

Whole-home 240V backup

OUPES Guardian 6000

4,608 Wh · 6,000W 120/240V · 95 lb · 89/100

Transfer-switch ready, expands to about 41 kWh. The panel connection is a job for a licensed electrician.

Price: $2,199.00

OUPES Mega 1 vs Mega 1 Lite

Both have the same 1,024 Wh battery, 2,000W inverter (4,500W surge) and 800W solar ceiling, so the choice comes down to four details from OUPES's Amazon listings:

Feature	Mega 1	Mega 1 Lite
B2 battery expansion	Yes, up to 2 (5,120 Wh)	Not listed
USB-C	2 × 100W	2 × 140W
Ports	13	9
Weight	27.8 lb	26.7 lb
AC charging (listing claim)	0–80% in 36 min	0–100% in 46 min at 1,400W
Our rating	89/100	87/100
Price now	$446.49	$489.00

Choose the Mega 1 unless you specifically want 140W USB-C for a power-hungry laptop. Expansion is the bigger difference: with a Mega 1 you can add a B2 battery when outages get longer, but with the Lite the capacity you buy is the capacity you keep. The full comparison is in our OUPES Mega 1 review.

How Long Will an OUPES Power Station Run Your Appliances?

The table uses capacity × 0.85 ÷ load, which allows about 15% for inverter losses. The Solar Lab measured about 79% efficiency on the Mega 1 at a heavy 1,779W load, so expect a little less at high draw. The loads are 60W (CPAP with humidifier, or router plus lights), 150W (a fridge while its compressor runs) and 500W (fridge, furnace blower and lights together). For your own appliances, use our solar size calculator.

Model	Capacity	~60W load	~150W load	~500W load
OUPES Mega 1 / Mega 1 Lite	1,024 Wh	~15 hrs	~6 hrs	~1.7 hrs
OUPES Mega 2 Pro	2,048 Wh	~29 hrs	~12 hrs	~3.5 hrs
OUPES Mega 3	3,072 Wh	~44 hrs	~17 hrs	~5.2 hrs
OUPES Guardian 6000	4,608 Wh	~65 hrs	~26 hrs	~7.8 hrs
OUPES Mega 5	5,040 Wh	~71 hrs	~29 hrs	~8.6 hrs
Mega 1 + 2 × B2	5,120 Wh	~73 hrs	~29 hrs	~8.7 hrs

These are continuous-draw estimates. A cycling refrigerator usually runs longer than the 150W column suggests. More appliance figures are in our sizing guide.

OUPES vs EcoFlow, Jackery and Anker at 1 kWh

The 1 kWh class is where most OUPES buyers compare brands. Every rival below is already rated on our site, so the scores are directly comparable. “$ per Wh” uses today's Amazon price and is blank when there is no live price.

Model	Our rating	Output / surge	Solar in	Weight	$ per Wh	Price
OUPES Mega 1	89/100	2,000W / 4,500W	800W	27.8 lb	$0.44/Wh	$446.49
EcoFlow Delta 3 Plus	89/100	1,800W / 2,400W	1,000W	26 lb	$0.70/Wh	$719.00
Jackery Explorer 1000 V2	93/100	1,500W / 3,000W	400W	23 lb	$0.52/Wh	$559.00
Anker SOLIX C1000 Gen 2	92/100	2,000W / 3,000W	600W	24.9 lb	$0.52/Wh	$529.99
Bluetti Elite 100 V2	90/100	1,800W / 3,600W	1,000W	25 lb	$0.49/Wh	$499.00

On paper the Mega 1 matches the Anker SOLIX C1000 Gen 2 on output and beats it on solar input and expansion. It loses on weight, about 2.9 lb heavier, and on the factors behind our ratings: warranty terms that differ by listing, fewer long-term reviews, and loud fans reported by both The Solar Lab and Bob Vila. The Solar Lab also found it pulls output voltage down during surges instead of briefly exceeding 2,000W, which matters for voltage-sensitive electronics. If brand does not matter and you want the highest-rated 1 kWh unit, see our best 1000Wh solar generators. Brand-level picks are in the solar generator brand comparison.

The OUPES B2 Battery: Which Models Expand, and How Far

The B2 is OUPES's 2,048 Wh LiFePO4 expansion battery. Adding a B2 adds stored energy but not inverter output: a Mega 1 with two B2s still tops out at 2,000W. The Solar Lab's Mega 3 review makes the same point about the larger unit. OUPES's Amazon listings give these ceilings:

• Mega 1: up to 2 × B2, 5,120 Wh total (also confirmed by Bob Vila and The Solar Lab)
• Mega 2 Pro: up to 4 × B2, 10,240 Wh total
• Mega 3: up to 6 × B2, 15,360 Wh total (also in The Solar Lab's review)
• Mega 1 Lite: the listing mentions no expansion support
• Guardian 6000: expands to about 41 kWh with OUPES's larger G5 packs, not the B2

If you expect to grow from 1 kWh to multi-day backup, an expandable unit costs less over time than buying a second station. For how OUPES's expansion compares with EcoFlow, Anker and Bluetti, see expandable power stations.

Is OUPES a Good Brand? What to Know Before You Buy

Where OUPES is strong

High output for the money: 2,000W at 1 kWh, 3,600W at 3 kWh. Every model uses LiFePO4 cells rated for 3,500+ cycles to 80%. Solar ceilings are generous, and the B2 expansion path is clear. The Solar Lab praises OUPES's customer support in both its Mega 1 and Mega 3 reviews.

Where to be careful

Warranty terms differ by listing (see below). The Mega 1 is heavier than its 1 kWh rivals, and reviewers call its fans loud. The Solar Lab found the Mega 3 app was missing the advertised peak-shaving feature, the Mega 5 supports only 120V, and the original Mega 2's 30A plug wasn't a true 30A plug.

OUPES warranty: confirm it on the listing

We found conflicting warranty terms. On October 31, 2026, OUPES's Amazon listing for the Mega 1 + 240W panel kit stated 3 years, while the Mega 1 Lite, Mega 2 Pro and Guardian 6000 listings stated 5 years. OUPES's own pages also disagree: its Mega 1 page lists 36 months, its Mega Series page says 5 years, and deal posts mention a sixth year after registration. Read the warranty line on the exact listing at checkout and register the unit with OUPES. We don't state a single warranty for the brand.

Who should skip OUPES

If you carry your station far, sleep next to it, or want the longest service record, look at the higher-rated Jackery Explorer 1000 V2 (93/100, 23 lb) or EcoFlow Delta 3 Plus (89/100). If you are planning whole-home backup with a transfer switch, compare the Guardian 6000 with the units in our home backup guide before deciding.

The OUPES Power Stations We Rate, With Live Prices

Ratings are our editorial scores, synthesized from published specs, logged Amazon prices and Amazon customer reviews. We do not physically test products. The Mega 2 Pro, Mega 3 and Mega 5 are not rated because we have no live price or second spec source for them yet.

Best OUPES overall

OUPES Mega 1

89/100

1,024 Wh 2,000W output 4,500W surge 800W solar in 27.8 lb

Budget 1,024Wh LiFePO4 station with 2,000W output (4,500W surge), 800W solar input and expansion to 5,120Wh with two B2 batteries, but at about 27.8 lb it is heavier than its 1 kWh rivals and reviewers report loud fans. Full review.

$446.49Current price on Amazon

Check Price on Amazon →

At our lowest logged price — $446.49 · our log since Oct 31

Best OUPES for whole-home backup

OUPES Guardian 6000 V2

89/100

4,608 Wh 6,000W output 9,000W surge 3,600W solar in 95 lb

4,608Wh LiFePO4 with 6,000W 120/240V output (9,000W surge), 3,600W solar input, transfer-switch ready and expandable to 41kWh — a strong-value challenger for whole-home backup. Full review.

$2,199.00Current price on Amazon

Check Price on Amazon →

At our lowest logged price — $2,199.00 · our log since Oct 27

Lighter, non-expandable 1 kWh

OUPES Mega 1 Lite

87/100

1,024 Wh 2,000W output 4,500W surge 800W solar in 26.7 lb

Slightly lighter 1,024Wh LiFePO4 version of the Mega 1 with the same 2,000W output and 800W solar input plus two 140W USB-C ports, but its listings mention no expansion battery support.

$489.00Current price on Amazon

Check Price on Amazon →

At our lowest logged price — $489.00 · our log since Oct 31

Prices shown are the current Amazon price. Badges come from our own daily price log — see the solar generator price tracker; they describe what we observed on the listing, not a manufacturer claim or a prediction.

Related Guides

OUPES Mega 1 Review

Specs, runtimes and how it compares with 1 kWh rivals

OUPES Guardian 6000 Review

4,608 Wh whole-home backup, transfer-switch ready

Solar Generator Brand Comparison

Jackery, EcoFlow, Anker, Bluetti and more

Transfer Switch for a Solar Generator

How whole-home units like the Guardian connect

OUPES Power Station FAQ

Is OUPES a good brand?

OUPES makes LiFePO4 power stations that are well specified for the money. The Mega 1 offers 1,024Wh, 2,000W output and B2 battery expansion, and The Solar Lab and Bob Vila both reviewed it favorably. In our scoring OUPES models rate 87-89/100, a few points below similar Jackery, Anker, EcoFlow and Bluetti units. That is mainly because OUPES has fewer independent long-term reviews, its warranty terms differ from listing to listing, and reviewers report loud fans on the Mega 1. If you want maximum specs per dollar, OUPES is worth a look.

Which OUPES power station should I buy?

For most people, the Mega 1. It is the best-rated OUPES portable in our scoring (89/100), it has a live Amazon price, and it covers a fridge, CPAP, router and laptops through a short outage or a camping weekend. If you need 240V whole-home backup through a transfer switch, choose the Guardian 6000 (89/100). Choose the Mega 2 Pro or Mega 3 only if you need 2-3 kWh in one box. Neither had a live Amazon price when we checked.

What is the difference between the OUPES Mega 1, Mega 2 and Mega 3?

Size and output. The Mega 1 is 1,024Wh with 2,000W output and 800W of solar input. The Mega 2 Pro is 2,048Wh with 2,500W output, a TT-30R RV outlet and 1,000W of solar input. The Mega 3 is 3,072Wh with 3,600W output and 2,100W of solar input. All three use LiFePO4 cells rated for 3,500+ cycles and expand with OUPES B2 2,048Wh batteries: up to 2 on the Mega 1, 4 on the Mega 2 Pro and 6 on the Mega 3, according to OUPES listings.

Is the OUPES Mega 2 the same as the Mega 2 Pro?

No. They are separate models. Both are 2,048Wh and 2,500W, but the Mega 2 Pro adds a bidirectional 1,000W Anderson DC port (12-80V, 30A) and 140W USB-C ports, according to OUPES and its Amazon listings. Reviews of the original Mega 2 from The Gadgeteer, TechRadar and The Solar Lab do not automatically apply to the Pro. The Pro is the version currently listed on Amazon.

What is the OUPES B2 battery?

The B2 is OUPES's 2,048Wh LiFePO4 expansion battery. According to OUPES's Amazon listings, the Mega 1 takes up to two (5,120Wh total), the Mega 2 Pro up to four (10,240Wh) and the Mega 3 up to six (15,360Wh). The Mega 1 Lite listing mentions no expansion support. The Guardian 6000 uses a different expansion pack.

OUPES vs EcoFlow: which is better?

At 1 kWh, EcoFlow's Delta 3 Plus rates higher in our scoring (89 vs 89 for the Mega 1). It is lighter at 26 lb against 27.8 lb and takes 1,000W of solar against 800W. The OUPES Mega 1 has more output (2,000W vs 1,800W); compare live prices in our 1 kWh table. Pick OUPES if output and watt-hours per dollar matter most, and EcoFlow for weight, solar input and a longer independent review record.

What warranty does OUPES offer?

It depends on the listing, so confirm before you buy. On October 31, 2026, the Amazon listing for the Mega 1 with a 240W panel said 3 years, while the Mega 1 Lite and Mega 2 Pro listings said 5 years. OUPES's own Mega 1 FAQ says 36 months, its Mega Series page says 5 years, and some deal posts mention a sixth year after registration. Check the warranty on the exact listing at checkout and register the unit with OUPES.

Sources: OUPES Amazon listings for the Mega 1, Mega 1 Lite, Mega 1 + 240W kit, Mega 2 Pro, Mega 3 kits and Guardian 6000 V2 (titles, bullets and warranty lines checked October 31, 2026); OUPES Mega 1 product page (800W solar, 1,400W AC, 2,200W AC + solar, B2 expansion); The Solar Lab Mega 1 review; Bob Vila Mega 1 review; The Solar Lab Mega 3 review (3,600W/7,000W, 2,100W solar, 86 lb, 15.36 kWh); The Solar Lab Mega 5 review (5,040 Wh, 4,000W, 2,100W solar, 120V only); The Solar Lab Mega 2 review and The Gadgeteer (original Mega 2); OUPES Mega Series page (Mega 5 5,040 Wh/4,000W; warranty wording). SolarGenAdvisor does not physically test products. Ratings are AI-assisted syntheses of specs, Amazon pricing and published reviews, scored with our scoring matrix and reviewed by our editor.